A NEW APPROACH TO OBTAINING KIKUCHI ELECTRON-DIFFRACTION PATTERNS FORHOLOGRAPHIC IMAGING

A newly developed method is reported here for taking Kikuchi electron diffraction patterns using conventional low-energy electron diffractio n facilities. Kikuchi electron forward-scattering diffraction patterns from a single crystal Cu(111) surface have been obtained using a hemi spherical rear-view LEED screen and camera interfaced to a computer. T he new technique allows us to take a set of Kikuchi electron diffracti on images over a wide primary energy range (50-950 eV in steps of 5 eV ) within a couple of hours. With this technique we show that the Kikuc hi electron, like the photoelectron and Auger electron, can be conside red as being emitted from inside the crystal.